$(function() {
	// Add the divs to the list items - this way they're not in the actual markup
	$("#main_nav li a").append("<div class='navBackground'>");
	$("#main_nav li a").hover(function() {
		// Set the height so they're visible (this keeps them hidden if JS is disabled), then fade in
		$(this).children().css('height','105px').stop().fadeTo(150,1.0);
	}, function() {
		$(this).children().stop().fadeTo(300,0.0);
	});
});